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H. NIELSEN AND F. D. MARSHALL.

AIR SATURATING TOWER,

APPLICATION msn sEPT. 11. 1920.

Patented May 17, 1921.

Specification of Letters Patent.

Potente@ ileigf Appieetom ilet September M, 1&2@ Serial No. 469,66?.

bers, iVes'tmifoster5 London, England7 have invented new and luseiel lmprovemeiite in Air-Satoreting Towers, of jve'iiicli the follovw ing is e specilicetion.

@or invention relates to mi apparatus especially applicable for setureiiig or air with moisture and particularly adapted for use Wil-ere air or ges is moisteiied by means of the hot liquid or Water 'fi-'om e ges cooling tower or time coiiizeining' iiiipurin ties some of which ere heavier climi We er and some of Wliicli are ofi oily oli-emmer and lighter ilizm Water.

The use of: our invention not however limitefi to this particular application' loui; can be usedi Whenever it is iesireri to eetu rate eirror my ges with the vapors of any im ure or dirty volatile liqoifi pperetus geoereily use'fi for the eliove purposes is eiiliei of e mechanical type that is to soy consists of e ioWer-lilie er verti callydisposed cyliniricel structure pro-- vided with either e revolving or estetionery spraying; device, or oi a. tov-vee or cylimier lilleol Wit-li a, suitable iiliiigg; materiel over which a, liqoiti trickle-.e so es to present e thin film of iiquiolto the action o? the gases or air, generally oto the co1mteremi-ent prireciple, l.

We have found that ya, mechanical device sugli es indicated above is not suitable iii every case, es tile iiquid. surece preeenieri to the action of the ges at any given moment is not very large, and the saturation of the gases is generaily all operation yreogiiring e. certain time contact and e, erge iiquici sur foce so' that in ordery to eect coiziiplete setw ration large :md cumbrous apparatus is required and large volumes oi liquid must be deelt with per unit o: time.

@n t'iie other heno. tine use off e tower con@ taining. e Filling materiel although it satis-e es the requireii coiiiiitioris es regerrls e larger liquid euirifece ie noi to loe recomiiieided, as when employed for 'not iiquid or waiter. containing terry mettereor other im purities io suspension5 the liiiiiigg meieriei becomes liable to be clicked with these ino purities, end to seperate the suspended matter large settling tanks are iequired-,\tiie use of which causes a drop in temperature 'and consequent Ciecreese in saturation eiiciencv of the liquid or Weiter, unless etltiitionai heet 1s supplied, which would increase tile cost or operating tliefapperzitus.

New, our invention iias for its object epparutus in which tiie above fescribed drewbacks ere eliminated ond io this end it com' kbetween it and tlie outer tower.

The internal tower or cylinder is open et the top and terminates iii e liquid or Water dietrilouter situated Well above the upper Surface of meteial with which the @mooier space between the two towers ci' cylinders ie packed. At iis lower and the seid inner cylinder extends through the `bottom of the outer cylinder emi terminates in a, sludge hopper or container, provided With, e Valve, which may lie openeci to drew oiiE heavier solid matter which collects the bottom of cylinder ai.,

The het Water, say from eA loot cooling tower and corifaeining various impurities in soepensioee is pumperi direct into the inner cylinder meer the bottom thereof, the size or diameter olf' the. seid inner cylinder being so celculated that the progress of the liet Water upwerti to the top or distribution point is very slow whereby the settling out of' solid; metter of heavier speciiic' gravity time, that of the liquor or Water and tile icoting upward of the lighter or erry motters is not interfered with, n

The imi-1er cylinder is divided into'sections treiisverseiy by i'iet or funnel-shaped bottoms or partitions, which' we 'provided w' L one or more lioies with long; depending; (i, pipes oi e suitebie diem.eiier Tiieee dip pipes are preferably staggered io eee-.ii sepa,n rete seetioii. so vmet eecli. opens ebow/e the solici loottoi'o or iop o' the compartment below. As :oeeriy as is practically' com/eou ieiit beneath each-oai suoli peeiitio'oe am out let 'pipe 'passes through the ennuler space Ricci the outer cylinder and 'terminates iii vs .ive oc the convenient removei my lighter or tarry impurities collected. on'the upper surface of the liquid contained 1n each compartment. i

It will. be understood that any lighter matter, during the slow upward' movement of the liquid, will thus be trapped inthe upper part ci" each compartment while the heavier matters gradually iind their way down to the sludge container or hopper as the dip pipes, in each compartment, depend wel] down into the liquid and will only allow comparatively clear liquid to pass into the compartment next in order above, the liquid linally reaching the distributer, being clear.

A preferred embodiment of the invention is illustrated in the accompanying drawing which shows in vertical section an lair satgrating tower constructed according to the invention.

ln the said drawing a indicates the closed outer cylinder, l) the air (or gas) inlet at the lower end and c the air (or gas) outlet at the upper end'thereof. d indicates'the :inner cylinder or tower of less diameter than the outer tower ande the annular concentric space which is formed between the said inner and outer towers' and which space contains the granular filling material f.

g is the liquid or water distributer which is litted to the openupper end of the inner cylinder d, is the sludge hopper 'which closes the lower end ol thesaid inner cylinder, e' 'the valve nwith which thesaid hopper is fitted andV j is the inlet pipe by which the water or other liquid enters the lower end of the tube, is the outlet pipe for the discharge of the liquid which has trickled down through the tilling material f in the space e,

Z indicates the bottoms orpartitionshere shown flat, although they may be 'funnel shaped, which divide the inner cylinder d into sections and m indicates the dip tubes, one of 'which depends 4from a hole nin each section into that immediately below it. A As shown, and as above cescribed, the dip tubes m are staggered in relation to each other so that each tube opens above a solid portion ol the 'partition belen.' it c indicates the outlet pipe which entends from the to of each section olf the inner cylinder c? laterally tlncu fh the space occupied by the filling material f and through the outer cylinder a and p .is the valve with which` each such tube is tilted.

he device operates follows. The hot water pumped 'through Athe inlet into the bottom oi the inner cylinder a and upward .froin section to section throgh the dip pipes m until it reaches the t. tributr y 'which spreads it over the upper surface el iilling material y downwaruiy through which it triclrles. ln its passagenn inner cy "nder d any heavy impurities w ich it Untains settle down in each section and are ultimately collected in the sludge hopper it while the lighter im purities, that is to say, such matter as is lighter than the Water, as oily'matter, float at the top of each section and are drawn oil through the pipes o by Yopening the valve p with which such pipes are provided. The air to be saturated enters the bottom of the outer tower a. at b and passes up through the filling material where it encounters the downwardly trickling water relieved of its impurities and finally leaves the tower in a saturated condition through the outlet 0 at the top.

lt will be understood that there can not be any such loss of heat from the liquids due to outside conditions, as would occur, for instance, when large outside separating -or settling tanks are employed, but that substantially all heat stored in the liquid entering the inner tower d is imparted to the filling material f in the annular space e, and this heat in turn is available for heating up the air or gas, and saturating the saine on its passage through the wetted lilling material. Furthermore, the large hulk of `hot liquid in the inner tower d acts as a very eliicient heat accumulator or equalizer so that the momentary variation in liquoa` sup-- ply will not have any appreciable influence on lthe temperature of the liquid distributed over the `filling f in the annular, space e, whereby greatfuniiormity and a' constant degreev of saturation is attainedn lt will, moreover, be clear that as the liquid distributed over the filling is clean, no choking of the filling material will he occasioned, and that the liquid, as'it reaches the bottom of the annular space, e, can he pumped back into the hot gas coolerand be thus used.

again.

Claims: y

l. A gas satura-ting apparatus comprising a closed outer cylinder, having e gas inlet at the bottom and a gas outlet at the top, and a concentric inner cylinder ol' .le diameter providing an annular space, containing lilling material, said inner cylinder being closed at its lower end and provided. adjacent to its lower end with a liquid inlet, and having its upper end provided -with a liquid distributing device discharging 'Within the outer cylinder, ,finto said annular space, upon the filling material therein.

2. A 'as saturating apparatus comprisving a c osed outer cylinder, having a gas inlet at the bottom and a gasoutlet at `the top, and a concentric inner cylinder ci? less diameter providing an annular space, containing lilling niaterhil, said inner cylinder' llosing closed at its lower end and provided adjacent to its lower end with a liquid inlet', and having its upper end rovided with a liquid distributing device discharging with in the outer cylinder, into said annuler space, upon the filling material therein, said inner cylinder being rovided with transverse partitions divi ing it into section, each partition being providedwitha hole, and a dip tube communicating therewith and depending into the section next below said partition, and laterally extending discharge pipes extending from the upper-ends of the several sections thereof through the said annular space and the outer tower, for drawing -oilighter impurities.

3. A gas saturating apparatus comprising a closed outer cylinder, having a gas inlet at the bottom and a gas outlet at the top, and a concentric inner cylinder of less diameter providing' an annular space, con-y taining illing material, said inner cylinder being closed at its lower end and provided adj acent` to its lower end with a liquid inlet, and having its upper end provided with a liquid distributing device dlscharging within the outer cylinder, into said annular space, upon the lling material therein, said inner cylinder being provided with transverse partitions dividing it into sections, each partition being provided with a hole, and a din tube communicating therewith and depending into the section next below said partition, and laterally extendingl discharge pipes extending from the upper ends of the several sections thereof through the said annular space and the outer tower, for drawing oiflighter impurities, -said inner cylinder being provided with a draw olf passage at its lower enddischarging. outside of the outer cylinder, a valve for normally closing said draw 0H" passage, and valves for closing said laterally extending discharge passages.

HARALD Nielsen.

' Panni-.mex nmcou MARSHALL. 

